Loadbearing capacity of infill masonry walls considering the deformation‐based membrane effect

According to currently valid codes, it is not possible to determine the loadbearing capacity of unreinforced infill walls considering the deformation‐based membrane effect by incorporating the exact support conditions. One reason for this is the lack of a validated calculation procedure, which in addition to the equilibrium conditions also realistically represents the compatibility conditions of these systems. In the present paper, therefore, a new non‐linear analytical calculation procedure is presented. The main focus of the analysis of walls subject to area loading is the incorporation of the support conditions and thus the consideration of the deformation‐based membrane compressive force. Through generalised formulation and a standardised notation of the determination equations, different material behaviours and various support conditions can be taken into account with few parameters. On the action side, both lighter loading like wind loads and heavier loading like explosion loads can be considered. Through the implementation of the partial factor concept, it is possible to comply with the requirements of European codes and thus ensure the applicability of the analysis model.     

When green marketing meets reality: selected facts about sustainable house building

Since 2012, Life Cycle Engineering Experts (LCEE) have carried out a series of comprehensive studies into the sustainability of market‐relevant (also potentially) construction methods in German housing ([1] to [4]). The methodical basis was a systematic application of the sustainability assessment approach of the Deutsches Gütesiegel Nachhaltiges Bauen (DGNB) applied to representative model buildings from the detached house and apartment building sectors (see Figs. 1 and 2). The key findings have been compressed into themed fact sheets intended to ensure appropriate knowledge and information transfer to various recipients. As a contribution to less marketing and more reality, the following paper outlines the lessons learnt from selected example fact sheets concerning sustainable housing.     

盛钢桶衬镁碳砖及铝镁碳砖的显微结构分析

对盛钢桶衬残砖进行了显微结构分析，查明镁碳砖及镁铝碳砖长寿的原因。     

耐火砖成形模的选材及制造工艺研究

选择 GW30钢结硬质合金制造耐火砖成形模 ,优化制造工艺 ,制得的成形模的使用寿命比 Cr12、2 0 Cr钢提高 10～ 2 0倍 ,具有显著的技术经济和社会效益。     

高基质普通烧镁砖的研制及应用

在普通烧镁砖中,提高基质相原料纯度,可使精炼铬铁炉炉衬寿命明显提高。     

砌体结构受爆破地震波作用破坏特征研究

在建筑物附近进行爆破作业产生的爆破振动,会引起结构一定程度的损伤,对结构的安全性和耐久性产生影响。根据现场工程情况,采用有限元软件ANSYS建立砌体结构的计算模型,对爆破地震波作用下其受力和变形进行数值模拟分析。研究表明,爆破地震波作用时,房屋门、窗户的四角部位和墙角等是易产生应力集中和破坏的关键部位;结构对爆破振动的响应程度随着结构物高度的增加而增大;砌体结构设计施工和在砌体结构附近进行爆破作业时,应采取相应减振措施,以降低爆破振动的危害。     

富金花茯茶水提物对四氧嘧啶诱导糖尿病小鼠的降血糖功效研究

研究富金花茯茶水提物对四氧嘧啶诱导糖尿病小鼠的降血糖功效.采用四氧嘧啶诱发糖尿病小鼠,随机分为模型组、阳性药组、富金花茯茶低剂量组、富金花茯茶高剂量组、黑毛茶低剂量组、黑毛茶高剂量组6个组,另选10只健康小鼠作为空白组.每4 d记录小鼠体重及进食量,每6 d断尾检测空腹血糖值.末次灌胃后禁食16 h,断尾检测空腹血糖值;并摘眼球取血,离心取上清按照试剂盒方法测定血清中TC、TG、HDL、LDL含量.结果表明,富金花茯茶、黑毛茶水提取均能缓解糖尿病小鼠消瘦和多食多尿的症状.富金花茯茶与黑毛茶均能有效降低糖尿病小鼠血糖值（P〈0.05）,其中富金花茯茶高剂量组小鼠血糖值明显低于黑毛茶高剂量组（P〈0.05）;且两组提取物均能降低小鼠血清中TC、TG、HDL浓度,对LDL和肝体比基本无影响.综上所述,富金花茯茶的降糖功效要明显优于原料黑毛茶.     

郑州市“城中村”房屋抗震性能研究

对郑州市"城中村"房屋进行了安全性调查,并选取典型的结构模型,对"城中村"房屋的抗震能力进行了分析研究,按照国家现行抗震设计规范的要求进行了抗震验算,指出这类房屋在抗震性能方面存在的一些共性问题.并提出了加固建议.     

蒸压灰砂砖墙片抗震性能试验研究

通过对蒸压灰砂砖墙片抗震性能的试验研究,揭示了其破坏特征,和到了墙片的滞回曲线及其它性能指标,对灰砂砖建筑的抗震性能作出评定;为该类建筑的抗震设计提供依据和方法。     

多遇地震下砖砌体结构的随机性分析

运用可靠度理论,依据我国现有的砖砌体结构所采用的设计规范,建立了抗震和非抗震的砖砌体墙的试验模型,采用Monte-Carlo随机模拟法,在水平地震作用下对这两类模型进行了试验分析,根据统计学原理,总结出砖砌体结构墙的失效部位主要发生在墙洞口的角部的结论和及其原因,并验证了有约束砌体的共同工作系数等结果.